Guys, When you genuinely like a girl and see a future with her, but you're just not ready to make it official bf/gf, how do you pull back?

How do you pull back/slow things down with a girl who you see a future relationship with, but you're just bit ready? You've already been intimate with her and you're in the cutesy honeymoon stage (ie, texting cute things, lots of kissy emoticons, spending lots of time together, etc)